New details of two wanted ISIS-linked militants suspected for involvement in last week’s grenade attack on a Malaysian nightclub have emerged.

Police identified the pair on Monday as Mohammed Saifuddin Muji, 28, and Jasanizam Rosni, 33, longtime friends and traders at the local night market, the Malaysian newspaper Star reports.

“I recognized him immediately when I saw the two photos being circulated on social media,” Jasanizam’s brother told the Star.

Saifuddin, who used to give rides to Jasanizam, was last seen seen at his home on Friday and has not been contactable since.

Malaysian police have so far arrested two suspects in the explosion that left eight injured at the Movida bar in the town of Pouching, where a crowd had gathered to watch a Euro 2016 football match. PoliceInspector-General Khalid Abu Bakar said that the detained men had received instructions from ISIS in Syria.

According to a Facebook post claiming responsibility for the attack by a man pledging allegiance to ISIS, the attack was an act of revenge on people participating in social activities during Ramadan. It is one of several acts of violence in the last month that have plagued cities worldwide during the Muslim holy month.